/**
 * Copyright 2011 FeedDreamwork SIG
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package org.feeddreamwork;

import java.io.*;
import java.util.*;

import javax.servlet.http.*;

import com.google.appengine.api.taskqueue.*;
import com.google.appengine.api.taskqueue.Queue;

import static com.google.appengine.api.taskqueue.TaskOptions.Builder.*;

public class UpdateDispatchServlet extends HttpServlet {
	@Override
	public void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws IOException {
		req.setCharacterEncoding("UTF-8");
		resp.setContentType("text/html; charset=UTF-8");
		resp.setCharacterEncoding("UTF-8");

		if (Utils.isNullOrEmpty(req.getHeader("X-AppEngine-Cron"))) {
			resp.sendError(HttpServletResponse.SC_FORBIDDEN);
			return;
		}

		FeedInfoRepository feedInfoRepo = new FeedInfoRepository();
		try {
			List<FeedInfo> feedInfos = feedInfoRepo.getFeedInfos();
			for (FeedInfo feedInfo : feedInfos)
				if (!FeedResultCache.containsKey(feedInfo.getFeedId())) {
					Queue queue = QueueFactory.getDefaultQueue();
					queue.add(withUrl("/settings/updatefeed").param("feedid",
							feedInfo.getFeedId()));
				}
		} finally {
			feedInfoRepo.close();
		}
	}
}
